The MIC1232 is a low-current microprocessor supervisor for monitoring 5V systems. The device features logic selectable (TOL) reset thresholds of 5% or 10% of 5V; a pushbutton reset input (/PBRST); a watchdog timer with three-state selectable (TD) timeout periods of 150ms, 600ms, or 1.2s; a fixed reset timeout period of 250ms (min); and active-low open-drain reset (/RST) and active-high push-pull reset (RST) outputs. The /RST output maintains a valid reset condition for VCC as low as 1.4V. The MIC1232 asserts a reset condition if the supply voltage drops below the reset threshold, the pushbutton reset is asserted low, or the watchdog timer does not see a high-to-low transition on the watchdog timer input within the watchdog timer period. A reset condition is held for the reset timeout period of 250ms (min) after the pushbutton input is released or after the supply voltage increases above the reset threshold voltage. The MIC1232 is a drop-in replacement for the DS1232, MAX1232, and TC1232. It consumes a low 18µA (typ) of supply current, 40µA (max). This is one-tenth the max current of the DS1232, and one-quarter the max current of the MAX1232 and TC1232. It operates over the –40C to +85C temperature range.
The Micrel MIC1232 is a low-current microprocessor supervisor designed for monitoring 5V systems. It features logic-selectable reset thresholds of 5% or 10% of 5V, a pushbutton reset input, and a watchdog timer with selectable timeout periods of 150ms, 600ms, or 1.2s. The device includes active-low open-drain and active-high push-pull reset outputs and operates over a temperature range of -40°C to +85°C.
| Supply Current (Typical) | 18uA |
|---|---|
| Supply Current (Maximum) | 40uA |
| Operating Temperature Range | -40°C to +85°C |
| Reset Timeout Period | 250ms (min) |
| Watchdog Timeout Periods | 150ms, 600ms, or 1.2s |
| Reset Threshold Options | 5% or 10% of 5V |
The typical supply current is 18uA.
The watchdog timer offers selectable timeout periods of 150ms, 600ms, or 1.2s.
Yes, it is a drop-in replacement for the DS1232, MAX1232, and TC1232.